Equivalent & Substitute Parts for ACDST-99-HF

Part Overview

The Comchip Technology ACDST-99-HF is a diode array for rectification applications, featuring a 1 pair series connection, 70 V DC reverse voltage, 200 mA average rectified current per diode, and automotive grade qualification. This part is supplied in a surface mount SOT-23-3 package and is AEC-Q101 and RoHS3 compliant. While the part is currently active and in stock, engineers may require alternatives for reasons including supply chain constraints, approved manufacturer lists, inventory status, or direct part matching against specific parametric and compliance criteria.

Key Parameters

Parameter	Value
Manufacturer Part Number	ACDST-99-HF
Diode Configuration	1 Pair Series Connection
Voltage - DC Reverse (Vr) (Max)	70 V
Current - Average Rectified (Io) (per Diode)	200mA
Voltage - Forward (Vf) (Max) @ If	1.25 V @ 150 mA
Reverse Recovery Time (trr)	6 ns
Current - Reverse Leakage @ Vr	2.5 µA @ 70 V
Operating Temperature - Junction	-55°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
Grade	Automotive
Qualification	AEC-Q101
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are selected strictly based on the following allowed parameters: diode configuration, reverse voltage (Vr), average rectified current (Io), forward voltage (Vf), reverse recovery time (trr), reverse leakage current, operating temperature range, mounting type, package/case, automotive grade, AEC-Q101 qualification, RoHS compliance, and moisture sensitivity level. Only parts matching or exceeding these specifications within the same category—Diodes, Rectifiers—are included as direct equivalents and substitutes.

Parameter Comparison

Manufacturer Part Number	Diode Config	Vr (Max)	Io (Max)	Vf (Max) @ If	trr	Ir (Max) @ Vr	Operating Temp	Mount Type	Package / Case	Grade	Qual.	RoHS	MSL	Status
ACDST-99-HF	1 Pair Series	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 70 V	-55°C ~ 150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	Automotive	AEC-Q101	ROHS3	1	Active
ACDST-99-G	1 Pair Series	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 70 V	150°C (Max)	Surface Mount	TO-236-3, SC-59, SOT-23-3	Automotive	AEC-Q101	ROHS3	1	Active
BAV99	2 Pair Series	75 V	215 mA	1.25 V @ 150 mA	4 ns	2.5 µA @ 75 V	-65°C ~ 175°C	Surface Mount	SOT-363	Automotive	AEC-Q101	(N/A)	(N/A)	Last Time Buy
BAV99 RFG	1 Pair Series	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 70 V	-55°C ~ 150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	(N/A)	(N/A)	ROHS3	1	Active
BAV99-TP	1 Pair Series	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 75 V	-55°C ~ 150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	(N/A)	(N/A)	ROHS3	1	Active
BAV99L RFG	1 Pair Series	70 V	200 mA	1.25 V @ 150 mA	6 ns	2.5 µA @ 70 V	-55°C ~ 150°C	Surface Mount	TO-236-3, SC-59, SOT-23-3	(N/A)	(N/A)	ROHS3	1	Obsolete

Engineering Selection Recommendations

Preferred substitutes are those which meet active product status, automotive grade classification, AEC-Q101 qualification, and RoHS3 Moisure Sensitivity Level 1 compliance, strictly per supplied parameters. Substitute selection for ACDST-99-HF should exclude obsolete or last time buy status unless actively required for legacy support. All substitutes with identical diode configuration, voltage and current ratings, package type, and compliance certifications are parametric equivalents for form, fit, and function within the Diodes, Rectifiers category.

Frequently Asked Questions (FAQ)

Q1: What are the critical parameters for substituting ACDST-99-HF in rectifier applications? A: Diode configuration, reverse voltage (Vr), average rectified current (Io), forward voltage (Vf), reverse recovery time (trr), reverse leakage current, operating temperature range, mounting type, package/case, compliance, and qualification status are required for substitution.

Q2: Are package variations allowed when substituting? A: Substitute parts provided share the surface mount form factor and the TO-236-3, SC-59, SOT-23-3 package type, ensuring mechanical compatibility for direct replacement, except BAV99 (SOT-363 package) which may require board layout adjustment.

Q3: Is automotive grade or AEC-Q101 qualification always required for substitution? A: If the original application mandates automotive grade and AEC-Q101 qualification, only substitutes with equivalent certifications should be selected.

Q4: Can parts with obsolete or last time buy status be substituted? A: Obsolete or last time buy substitutes are referenced for legacy support or approved component lists but are not recommended for new designs per the supplied status parameter.

Q5: What is the importance of RoHS3 and MSL compliance in selection? A: RoHS3 and MSL 1 compliance confirm environmental and assembly process compatibility per industry standards and supplied requirements.

Q6: Do reverse leakage current or recovery time variations affect compatibility? A: Only parts matching or exceeding the specified reverse leakage and recovery time are included here, ensuring parametric compatibility for rectifier performance.

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